[llvm] [AArch64] Increase scatter overhead on Neoverse-V2 (PR #101296)

[David Green via llvm-commits]

https://github.com/davemgreen approved this pull request.

Thanks. It looks like the VScaleForTuning is coming through as 2 for it.

LGTM

https://github.com/llvm/llvm-project/pull/101296